package com.hqyj.service;

import com.hqyj.pojo.Bill;

import java.util.HashMap;

public interface BillService {
    //查询
    HashMap<String,Object> select(Bill b);
    //新增
    HashMap<String,Object> add(Bill b);
    //修改
    HashMap<String,Object> update(Bill b);
    //删除
    HashMap<String,Object> del(Integer b);



}
